Environmentally benign alginate extraction and fibres spinning from different European Brown algae species

Date

2022-12-08

Supervisor/s

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Department

Type

Article

ISSN

0141-8130

Format

Free to read from

Citation

Silva MP, Badruddin IJ, Tonon T, et al., (2023) Environmentally benign alginate extraction and fibres spinning from different European Brown algae species, International Journal of Biological Macromolecules, Volume 226, January 2023, pp. 434-442

Abstract

Applications of natural fibres are expanding, and sustainable alternatives are needed to support this growing demand. We investigated the production of fibres using alginates from Saccharina latissima (SAC), Laminaria digitata (LAM), Sacchoriza polyschides (SACC), and Himanthalia spp. (HIM). After extraction (3 % w/v biomass) using a sustainable protocol based on citric acid, crude alginate represented 61–65 % of the biomass dry weight for SAC and LAM, and 34–41 % for SACC and HIM when experiments were performed at small scale (1.5 g of starting material). Interestingly, scaling-up extraction (60 g of starting material) decreased yields to 26–30 %. SAC and LAM alginates had the highest M/G (mannuronic acid/guluronic acid) ratios and molecular weights when compared to those from SACC and HIM (M/G:1.98 and 2.23, MW: 302 and 362 kDa, vs 1.83 and 1.86, 268 and 168 kDa). When the four types of alginates were tested for spinning fibres cross-linked with CaCl2, only SAC and LAM alginates produced fibres. These fibres showed no clumps or cracks under stretching action and presented a similar Young's modulus (2.4 and 2.0 GPa). We have demonstrated that alginate extracted from S. latissima and L. digitata can be successfully spun into functional fibres cross-linked with CaCl2.

Description

Software Description

Software Language

Github

Keywords

Saccharina latissima, Laminaria digitata, Sacchoriza polyschides, Himanthalia spp, Alginate, Fibre, Wet spinning

DOI

Rights

Attribution 4.0 International

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Relationships

Supplements

Funder/s

Biotechnology and Biological Sciences Research Council (BBSRC): Network in Industrial Biotechnology and Bioenergy BB/S009779/1. European Union funding: 727892.